Q.
If the external resistance is equal to the internal resistance of a cell of emfE . The potential difference across its terminal is
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a
E2
b
E
c
2E
d
Zero
answer is A.
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Detailed Solution
External resistance(R) = Internal resistance (r) V=E−ir =E−VRR =E−V 2V=E ∴ V=E2
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